Stove



J. H. DEAN.'

STOVE.

APPLICATION FILED Nov.15. 1920.

1,409,679. Patented Mar. 14,1922'u lllllllll- Wink UNITEDd sTATEs JAMESH. DEAN, or CHICAGO, ILLINOIS.

srovn.

l Specification of Letters Patent.

Patented Mar. 14, 1922.

Application led November 15, 1929. Serial No. 424,020.

T0 all whom t may concern.'

Be it known that I, 'Jarras H. DEAN, a citizen of the United States,residing at Chicago, in the-county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Stoves, of which I dodeclare the following to be a full, clear7 and eXact description,reference being had to the accompanying drawing, forming a part 'of thisspecification.

' The present invention has relation more particularly to that class ofstoves known as hot blast77 stoves, and the invention consists-in thefeatures of novelty hereinafter described, illustrated in theaccompanying drawing and particularly pointed kout in the claims at theend of this specification.

Figure l is a view in central vertical scction through a stove embodyingmy inven tion. Figure 2 is a sectional view of a portion of the stove,the view being taken on the line 2-2 of Fig. 1.

In the drawing, A designates the base or lower portion ofthe stove, thisportion consisting preferably of a casting divided by the transverseplate 5. That part of the base portion A beneath the plate 5 consti`tutes the ash pit at the frontv of which there is a door 6 mounted uponhinges 7 and provided with suitable air admission openings controlled bya revoluble valve 8 of familiar construction. The transverse plate 5 isformed with a central opening above which is setv the fire potv B havingat its bottom a grate @,this lire pot being arranged within the upperchamber 9 of the lower portion of the stove. In the front of the chamber9 is formed an opening infront of vwhich there is a door l0 mounted uponhinges 1l,V and this door is preferably formed with openings that arecontrolled by a pivoted valve l2 of familiar construction. The baseportion of the stove is shown as having formed'integral therewith anelbow 14 to which is connected the lower end ofa smoke flue D.

The lire pot B which is preferably a'casting of a truncatedconical-shape, is smaller in diameter than the diameter of the upperchamber 9 of the stove base wherein it is aranged and upon the upperedge of the stove bas'e'A is mounted a rim E having a conicalfuel-deflecting surface .l5 and depending lugs 16 the shoulder portionsi7 of which rest upon the edge of the top of the base portion A.vPreferably, there are four of .these lugs 16 spaced at intervals aroundthe rim E. The space between the top of the fire pot B and the lowerportion of the rim E and the space between the fire pot and the outerwall of the upper portion of the base A afford a passageway for productsof combustion to pass therethrough from'the fire pot into the chamber 9of the base A and thence by the elbow 14 into the smoke flue D.

The chamber 9 of the upper portion of the base A and the rim E areencircled by the lower portion of the body casing F of the stove thatis. preferably formed ,of sheet metal. In the front of this casing F isVformed an opening normally closed by a door 1S mounted upon hinges 19.

Across the top of the casing F extends a top plate G; that is preferablyformed of cast metal having a depending flange united by rivets 20 tothe top of the casting F. Preferably, there is formed integrally withthis top plate G a pipe section lr that forms part of the smoke flue Dand this section extends both above and below the top plate G. The partof the section G depending below the top plate Gr is provided with anopening 22 that is arranged opposite a similar opening formed in theupper part of the casing F at its back. The part ofthe line section Gthat rises above the top plate (l is formed with an opening 23 to theatmosphere. The openings 22 and 23 are controlled by a single valve I-Ithat is preferably arranged within the line section Gr and the fluesection G may be rectangular in section or the wall of the flue sectionagainst which this valve H is placed may be flattened to permit thevalveV to be turned. As shown, the valve H is formed with a tubularsleeve 25 through wl 'ch passes a shaft 26 having at its outer endY ahandle 27 whereby the valve H may be turned. i The sleeve is connectedby a cotter pin 25a to the shaft 26 and the inner end of this sha-ft 26is journaled in a seat 26a. The valve II is formed with a single opening29` that may be brought into register to a greater or less extent witheither of the openings or Q3 to thereby regulate the flow through one ofsaid openings and close the otherr` or the valve may be positioned toclose both openings.

lllithin the casing F is mounted an openended het blast pipe the purposeof which is to conduct air mingled with the light and unconsumed gasesfrom the upper portion of the casing F down on to the bed of fuel.

il In the preferred embodiment of my invention, the hot blast pipeconsists of a tubular casting K that is suspended from the top plate Grand extends over the combustion chamber or casing F of the stove. Asshown,

the top plate G is formed with a central Y opening havinga dependingangular flange whereon rests a iiange 3l formedat the top of the hotblast pipe K. The top of the hot'blast pipe K is shown as formed withaplurality of openings 32 and von the top of thepipe K is mounted a valveK that is pivoted,'as at 33, to the top of the pipe K. This valve K isformed with openings corresponding with the openings 82 in the top ofthe pipe K and these openings serve to admit air into thetop of thepipe. At a short'distance below the top of the pipe K through. rlhe airpassing through the pipeY there are formed a plurality of openings 35for the admission to the pipe of the light and unconsumed gases thatrise to the top of the combustion chamber wherein the pipe K isvsuspended.y Preferably, the pipe K is formed with lugs or offsets 36andthe openings or ports 35' extend from the upperv portionsv of these lugsor off-sets and are inclined inwardly and downwardly thereof which liesin a horizontal plane extend- Y through plate.v

the valve H Vinthe iiue section ing through the lower'end of the pipe.This form gives a venturi effect and aids in eifectively drawing in thecombustible gases the inclined openings or ports 35i. An a vantageincident to suspending the pipe K from the top plate G is that the'pipeK can be readily removed and replaced by withdrawing it from the openingin the top From the foregoing description, theo eration of my improvedstove `will be un erstood to be as follows: When a fire is laid upon thegrate C of theiire pot B, the valve K at'the top of the 'hot blast pie Kand willrbe in closed position and the valve S at the front ofthe Vashpit chamber of the stove base A will be opened. Products of com- Ybustion will then pass from the fire pot and from the combustion chamberof the casing F in the direction of the arrows Figs. 1 and 2 of thesmoke flue D. After the fire has been started.I the iiue K at the top ofthe hot blast .pipe K will be turned more or less to admit air throughthe openings 82 and the air thus admitted will pass downwardly throughthe hot blast pipe' K and betweenthe upperv'edge ofthe fire pot B andthe upper part ofthe base Afinto the chamber 9 within which the ifirepot is located andwill pass thence YVthrough 'the elbow Y .14 to thesmolre'lue In Vthis passage of the products of combustion throughv thechamber 9, the fire pot- B andthe .fuel contained thereinwill befintensely heated .and the effective burning of the'fuel will be therebygreatly facilitated. It will be understood, ofcourse,fthat after thefire has been started, the valve 8 inthe ash V.pit may be closed moregorless. By means of the valve K, the amount of air admitted to thehotblast pipe K can beaccurately regulated Vand theintensity of the downblast through this pipe can thereby'be controlled.

It should be noted that the hot blast pipe has a discharge outletrat itslower end only which opens into the lower portion of the` combustionchamber in-,proximity with the fuel bed and that. it is provided onlyvin the vicinity of the upper Vportion of the combustion chamber withinlet ports or passages through which'any light unconsumed gases aredrawn by the'blast of heated air passing through the pipe, these. gasesbeing mixed with the air and so delivered into the zone off greatestheat inthe lower por# tion of thecombustion chamber and so effectivelyconsumedi. rl `heV arrangementY is particularly of advantage for .theVVeffectiver consumption of the gases given Voil from bituminous coal.After all of the gases have been driven off from such coal Vand itisthoroughly coked, the hotblast pipe is preferably closed andtheairnecessary for 'combustion admitted from theash-'pitrbe- Thevalve Hwithin the low the lire-box. smoke flue section G hasV atwo-foldpurpose. VVhen lthis valve is in the position indicated in Fig. 1 vofthe drawing,atmos phcric air will be admitted lto the smoke flue D,thereby serving to check the draft. lVhen, however, fuel'is beingdelivered .to

the stove through the doorlS ofthe Ycombustion chamber or casing'F, thevalve H should be turned so as to bring its opening 29 opposite theopening 22 in theupper part of the combustion chamber and thus preventany out-puffing fof they-gases or products of combustion from the casingF through thedoor while fuelis being delivered to the stove. u

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is u ,jj

'l'. A stove'of the character described comprising aI combustion chamberhaving a top plate, a smoke pipe having a 'section extending above Vand-below said top plate and provided above said top plate with an openingcommunicating with the atmosphere and below said top plate with anopening communicating with the combustion cham'- ber,'and a single valvefor controlling said openings and adapted to close one of said openingsand regulate the fiow through the other or to close both of saidopenings.

2. A stove of the character described comprising a combustion chamberhaving a top plate, a smoke pipe having a section extending above andbelow said top plate and provided above said plate with an openingcommunicating with the atmosphere and below said plate with an openingcommunicating with the combustion chamber, and a valve provided with asingle opening adapted to be brought opposite either of said openings insaid smoke pipe section.

3. A stove of the character described comprising a combustion chamberhaving a top plate, a smoke pipe provided above said top plate with anopening communicating with the atmosphere and belowT said top plate withan opening communicating with the combustion chamber, a valve pivotallymounted within said smoke pipe, and a handle arranged outside said smokepipe and connected to said valve whereby it may be shifted to closeeither or both of said openin s.

(di. A stove of the character described comprising a combustion chamber,a top plate, a smoke pipe section formed integral with said top plateand extending above and below said top plate and provided above saidplate with an opening communicating with the atmosphere and below saidplate with an opening connecting with the combustion chamber, and asingle valve arranged within said pipe section for controlling saidopenings whereby the extent of either of said openings may be modifiedor both may be closed.

5. A stove comprising a fire-pot, a combustion chamber above the same,and a hot blast pipe in communication at its upper end with an air inletand extending downwardly in said combustion chamber, said pipe having adischarge outlet at its .lower end only opening into the lower portionof said combustion chamber and also having portions through which gasesare drawn Vfrom the upper portion of the combustion chamber and causedto pass with the air through said pipe.

v 6. stove of the character vdescribed comprising aire-pot, an enclosingcasin form- ',ing a 'combustion chamber above the re'pot,

a 'centralhot blast pipe'communicating at its upper end with an airinlet and extending .downwardly in said combustion chamber, said pipehaving a discharge opening at its lower Vend only opening intol thelower` portion f said lcombustion chamber, and said pipe having ports,for admittinggases into the body of air passing therethrough from thelupper portion only of the combustion chamber.

7. A stove of the character described comprising a fire-pot, acombustion chamber above the fire-pot having a top plate with an openingtherein for the admission of air, a valve for controlling said openingand a hot blast pipe extending downwardly from said opening and having adischarge outlet at its lower end only opening into the lower portion ofsaid combustion chamber, said pipe being provided only adjacent itsupper inlet end with ports whereby light gases may be drawn from theupper portion of the combustion chamber and caused to pass with the airdown through said pipe.

8. A stove comprising a fire-pot, a coinbustion chamber above thelire-pot, a smoke flue communicating with the lower portion of thecombustion chamber and a hot blast pipe communicating at its upper endwith an air inlet, extending downwardly through the combustion chamberand having a discharge outlet at its lower end only at the lower portionof the combustion chamber, said pipe having ports through which lightgases may be drawn from the upper portion of the combustion chamber andcaused to pass with the air down through said pipe.

9. A stove of the character described comprising a fire-pot, a casingaround said firepot and extending above the same to form a combustionchamber, said fire-pot being spaced from said casing to a'ord an exitfor the products of combustion from the lower portion of the combustionchamber, a smoke iiue leading from the space about the fire-pot and ahot blast pipe communicating at its upper end with an air inlet,extending downwardly through the combustion chamber and having adischarge outlet opening into the lower portion of the combustionchamber in proximity with the fuel bed, said pipe having ports leadingfrom the upper portion of the combustion chamber for the admission ofgases therefrom into the air passing through the pipe.

10. A stove of the character described comprising a fire pot and acombustion chamber above said lire pot having an opening in its upperportion for the admission of air, and a hot blast pipe extendingdownwardly from said opening, said blast pipe being provided withdownwardly and inwardly inclined ducts or openings whereby ing into thelower portionof the combuslight gases maybe admitted from the comtionchamber, said pipe gradually decreasbustion chamber and be caused topass with ing in erosssection from its upper to its the air down throughsaid hot blast pipe. lower end and having inwardly and down- 5,V l1. Astove comprising a repot and a wardly inclined ducts through which-light15 combustion chamber above vthe'ire-pot, a hot gases are drawn from theupper portionV of blast pipe communicating atits lupper end thecombustion chamber and caused to pass with an air inlet, extendingdownwardly with theair down through the pipe. through the combustionchamber and havf :10 Ving a discharge outlet at its lower end openyJAMES DEAN.

